weideer Digital Thermometer Dual LED Display Fahrenheit to Centigrade Adjustable DC 4-28V -67~+248℉/-55～+120℃ High Accuracy Temperature Gauge Sensor with 2 Waterproof NTC Probes K-017

They're not forthcoming with instructions on how to adjust/calibrated each channel but it involves holding down the micro pushbutton on the PCB until you reach the menu. To reach the menu, hold down the button for 2~3 seconds... •Short clicks scroll thru the parameter selection, press and hold to adjust the parameter •When the parameter is being adjusted by holding the button down, it will increment. Release the button for a second and hold it down again to decrement. It's a little confusing but it really does work! The method described is something you really have to do yourself - until you 'get it' To make life easier, I desoldered the surface mount pushbutton and added a normally open pushbutton on a 8" length of wire...I put the works (batteries, switch & display in an appropriate enclosure) I fabricated a Subcooling & Superheat measurement instrument from this device...the RED colored display measures/displays the temperature of the high pressure/liquid line. The BLUE colored display measures/displays the temperature of the low pressure/suction line. By use of a custom made circular split bushing which replaces the jaws of a plastic spring clamp (to hold the thermistors on each of the aforementioned lines) I'm able to calculate subcooling & superheat parameters whilst adding refrigerant to an HVAC system. Powered by 2x 18650 batteries - this thing works great. It's accurate on a 2 point calibration - if you take the time to do it. I think it's an excellent gauge. Great price point - love the 2 different colors on the display. This is the way to get a good thermometer gauge for a great price. I'm going to purchase several more since these work so well. Two thumbs up!

I purchased this Item as an Install into the Dash of one of my Trucks which does not have an outside Temp gauge. I really like everything about it, It has a vary small compact footprint. The Dual Display is bright and easy to view during the day and not terribly bright at night, If the Units Brightness is too intense for a person, you could cut a Gel Filter used in Lighting to darken it, cut to fit the face. The internal Menus are fairly straight forward once you navigate around and get a feel for them. I Recommend Saving the image from Amazon, as there's no Documentation that comes with it. Each probe is capable of being Calibrated. I tested their Reading against a Reference i have and they were well within a degree of my Reference. For the Price of them its a decent buy. On the Mounting end of things, this Display was designed as a Panel Mount, so your going to want to create an enclosure or have a place and cutout ready for it. So far i have to give it a 5 Star Rating across the board, I will update over time for and long term failures on it. (Edit: Added Content and Picture) The LCD Segments look weird because of the Camera Refresh Rate. Its only an Artifact, LCD is Clear and Bright. The Temp Sensors Seem to be Stable once i got them Calibrated I had to extend the wire lead to the outside temp probe, which was no issue. So far I'm liking it especially and for the money!)

Very nice dual zone wired remote thermometer. I love its small size and bright digital displays. The unit is really sensitive and responsive and its accuracy was spot-on for me. The best feature of this thermometer (in addition to its dual displays) is the fact you can change between F and C display units and the measured temperatures can be adjusted to compensate for any error or temperature differential you might need. Pay attention that this thermometer uses NTC probes and is NOT K-type thermocouple compatible. I made this mistake thinking I could use this module with existing thermocouples I had, but I ended up needing to change out the entire system. Luckily it wasn't difficult for me and I actually like the performance of the NTC probes even better.

I'm installing this gauge on a side by side UTV. Unfortunately, the circuit board is open to the environment and UTV's get wet easily. I bought some potting silicone caulk and potted the circuit board to keep the water away. I hope it works.

Great product. Accurate and easy to read. I use them as they are, with a 9 volt battery box. Now I get to hear a joke from Jeff, for reviewing a bunch of products.

Used unit to measure Hydraulic fluid temperature before and after the cooler. Both probes read the same temp within .2 of a degree. Longer power wires would be nice.

Not having such great luck with this temp guage. Seems to periodically start flashing, goes blank, and then works fine again. Im using it to read cylinder head temperature on a Buell motorcycle. I just attached the probes with epoxy and it works very well. Until the flashing begins. I will be investigating the wiring this weekend to see if that may be an issue. I will update once I'm certain of what's causing the issue.

Easy to read and very bright. Standard size that fits the opening of a voltmeter I don't need anymore. I use it for indoor/outdoor temp readings in my off-grid cabin. The button on the back has a few options on it. I wish I knew what they were. I love how I can switch it to Celsius for the Canadians.